Review: I had searched all over for an x-pen cover like this and was thrilled to find this one. It seems like a great product. However, when I tried it on the pen, it does not fit. Not even close. I have a standard 8-panel x-pen from Midwest. It is older, so maybe the sizes have changed. I would recommend this cover, just make sure you measure your pen first so you don't have to pay for shipping bothways.